Metallic screen.



G. H. MOGEE.

METALLIC SCREEN.

APPLICATION FILED 213.21, 1914.

Int/e refer.- OhaJ'ZeG 7777770c g Patented Mar. 23, 1915.-

fliiornej s Zz/a' 76668663:

UNITED s'ra'ras PATENT OFFICE.

CHARPES H MoGEE, OF YOR'ILAND, MAIITE, ASSTGITOR 'lO CHAMPION METALWEATHER AITI D FARTING HEAD COMPANY, OF BOSTON, MASSsACHUSETTS, ACORPORA- METALLIC SCREEN.

Specification of Letters Patent.

Patented Mar. 23, 1915.

To all whom it may concern: r r

Be it known that I, QnAnLns McGnn, a citizen of the United States andresident of Portland, in the county 0. Cumberland and State of Maine,have invented certain new and useful Improvements in Metallic Screens,of which the following is a specification. I

This invention relates to a window and other screen comprising a sheetmetal frame, a sheet of screen material such as woven wire, and metallicmeans for securing the ed es of the sheet to the frame.

he invention has for its object to enable the screen material to bequickly, conven iently and securely applied-to the frame and to beremoved with equal facility when it is desirable to renew thesereenmaterial.

The invention consists in the improve ments which I shall now proceed todescribe and claim.

Of the accompan' ing drawings forming a part of the speci cation, Figure1 represcnts a side elevation of a portion of a metallic screenembodying my invention; Fig. 2 represents a section on line 2-2 of Fig.1; Fig. 3 represents a transverse section of one of the members of themetallic frame and of one of the metallic confining strips, said partsbeing separated; Fig. 4: represents a view similar to Fig. 2,illustrating the manner of separating a confining strip from a framemember; Fig. 5 represents a View similar to Fig. 2, showing amodification. Fig. 6 represents a cross-sectional view of a confiningstrip embodying amodifioation.

The same reference characters indicate the same or similar parts in allof the views.

. The frame of my improved screen comprises sheet metal memberspreferably mitered at their ends and united by brazing or otherwise toform a continuous frame, the corners of the frame being preferablyreinforced by-angle pieces 6, as shown in U. S. Patent 917,106, grantedto me April 6, 1909.

Each member of the frame is composed of a strip of sheet metal bent toform a relatively wide inner wall 12, a relatively narrow outer wall 13,an dge wall 14 connecting the walls 12 and 13, a clamping flange 15forming a continuation of the inner wall 12 and a locking flange 16forming a continuation of the outer wall 13. As shown by the drawings,the flanges 15 and 16 project in opposite directions, said flangesforming the sides of a threat 17 (Fig. 3) extending lengthwise of theframe member.

The sheet 18 of screen material has its edges bent inwardly over theclamping flanges 15, as shown by Fig. 2. These in wardly bent edges aresecured by a series of confining strips, each having a clamping face 19adapted to cooperate with the clamping flange 15 in securing theinwardly bent screen material and a locking face 20 adapted to cooperatewith the lockin flange 16 in locking the confining strip an the frame,the locking face 20 being provided with a shoulder 21 adapted to engagethe inner edge of the locking flange 16, as shown by Fig. 2. Eachconfining strip is preferably made from a sheet metal blank bent to givethe strip a U-shapc in cross section, one of the flanges of the U-shapedstrip forming the clamping face 19, while the other flange forms thelocking face 20, the two flanges being united by a neck 22 which ispreferably rounded as shown.

When the edges of the screen material are bent over the clamping flanges15 the confining strips are forced into the throat 17 from the positionshown by Fig. 3 to that shown by Fig. 2, the clamping face 19 of eachstrip being thus caused to cooperate with a clamp ing flange 15, whilethe locking face is caused to cooperate with the locking flange 16. IWhen the parts are thus assembled they can be separated only by tippingthe confining strips outwardly by means of a knife blade 2 1 or otherlike instrument inserted in the crevice between the locking flange 16and the locking face 20, as indicated by Fig. 2. The clamping facel9..is extended sufficiently to enable its inner edge to be supportedWithin the frame either by direct contact with the inner side portion ofthe frame or with theinterposed screen material, as indicated by Fig. 2.When the prying instrument 24 is moved from the position shown by Fig. 2to that shown by Fig. 4 the confining strip is tipped to. disengage itsshoulder 21 from the edge of the locking flange 16, as clearly indicatedby Fig. 4, so that the confining strip is free to be removed from theframe.

The frame flanges 15 and 16 are made of relatively thin resilient sheetmetal and are adapted to yield to permitthe disengagement of the lockingshoulder. from the looking flange, the said flanges being capable ofspringing away from each other to increase the width of, or expand thethroat 17. The confining strip is not necessarily resilient O1compressible and when formed as shown by Figs. 2, 3 and a is preferablymade of relatively thicl: sheet metal so that it is practically rigid orincompressible. -Fig. 5 shows a confining strip composed of a rigidsolid bar having a clamping face 19 and a locking face 20* provided witha locking shoulder 21. The practically rigid confining strip when inplace supports the resilient locking flange 10 and prevents the sideportion 13 from being bent, or sprung inwardly.

The frame clamping and locking faces of the confining strip arepreferably inclined, as shown by the drawings, this inclinationimparting suitable stiffness to the clamping flanges l5 andfacilitatingthe operation of tipping the confining strips outwardly, the inclinedface 19 being caused by its inclination to project considerably outwardfrom the edge of the clamping flange 15, so that it is freely tippedacross said edge as indicated by Fig. 4. A packing of cement may beinserted between the faces of the confining strip and the flanges 15 and16, to exclude water from the interior of the frame.

The confining strip shown by Fig. 6 differs from that shown by Figs. 2,3 and 4 in that the edge 19 is bent to present a curved surflanges l5and 16 and the face instead of a sharp edge, the purpose in forming thebend being to facilitate the slipping movement and avoid injuring thescreen material when inserting the confining v strip into the throat 17.

Having described my invention, I claim:

A screen comprising a frame composed of sheet metal members, each bentto form an inner wall, an outer wall, and an edge wall connecting theinner and outer walls, a resilient clamping flange projecting from theinner side wall and a resilient locking flange projecting from the outerside wall, said flanges projecting in opposite directions and formingthe sides of a longitudinal throat, a sheet of screen material bent atits edges over the said clamping flanges and confining strips formed toenter said throats and having clamping faces cooperating with theclamping flanges in securing the screen material and locking faceshaving shoulders adapted to engage the locking flanges to lock theconfining strips to the frame, the frame flanges and the faces of theconfining strips being inclined, and the said clamping faces beingadapted to be tipped outwardly to dis; engage their shoulders from thelocking flanges.

In testimony whereof I have aflixed my signature, in presence of twowitnesses,

CHARLES H. MCGE Witnesses:

C. F. Bnown, J. MURPHY.

